Improvement in rotary grate-bars



. dotted mes @met (attire.

DAVID BYAnnoFsHAnoN, PENNSYLVANIA.

Letters Patent No. 108,327, dated October 18, 1870; antedated October 4,1870.

IMPROVEMENT lN ROTARY GRATE-BARS.

The Schedule :efe'rred to in these Letters Patent and making part of thesame.

To all whom it may concern Be it known that I, DAVID BYARD, of Sharon,in

the county of Mercer and in the State of Pennsyl-l vania, have inventedcertain new and useful Improvements in Rotary Grates; and do herebydeclare that the following is a full, clear, and exact descrip@ Ationthereof, reference vbeing had to the accompanying drawing and to theletters of reference marked' thereon, making a part of thisspecification.

y My present invention is an improvement upon the grate for whichLetters Patent were granted to me September 7 1869, and consists- First,in constructing the rings so as to protect the edges ot' the frame orbearing-bars from the heat or lire, without weakening the rings;

Second, in soplacing the lugs on the sides of the rings' that a'currentof cold airw'ill pass Vbetween the inner ends of said lugs and the edgeof the bearingbars; and

Third, in making the center in one piece, whereby the frame is made tosupport and strengthen the shaft.

In orderto enable others skilled in the art to which my inventionappertains to make and use the same, I will now proceed to describe itsconstruction and operation, referring to the annexed drawing, in which-Figure 1 s'an end view; and

Figure 2 is a plan view of my grate; p

Figure 3 isa side View of one of the rings, showing the position of thelugs thereon; and

Figure 4 is a longitudinal vertical section of the same.A

A A represent the rings of which my grate is coniposed, said ringsbeing, on their inner circumference, provided with notches a a. At thepoints where these notches are, the ring is enlarged inward, so that thenotches will not be out out of the ring proper,l but from theseenlargements, and consequently the ring not weakened in any manner.

On the sido of the ring arc placed any desired number of lugs, b b, oneofV said lugs being placed directly opposite the inner corner of eachnotch a, and a short Y distance from it, as shown in fig. 3.

.By this arrangement of the lugs b b, the edges of frame or bearing-barsare protected from the tire, and a current of cool air is allowed topass bctween'them and the lugs.

The outer surface of the rings A A is made rounding, so that anyclinkcrs forming on it can bc readily removed.

The frame or center B is l composed of the shaft d,

-arms e e, and bearing-bars ff, all made in one piece,

l with notches da, and lugs l) b, as shown and described,

and for the purposes set forth. Y

. 2. The combination of the shaft d, arms c c, and bearing-bars f f,when all are made in one piece, substantially as and for the purposesherein set forth.

. In testimony that I claim the foregoing, I have hereunto set my handand seal, this 14th day of February, 1870.

lWitnesses: DAVID BYARD. [In s.]

WM. MORGANTHANE, ABNER APPLEGATE.

